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Title:
Stokes profile analysis and vector magnetic fields. IV - Synthesis and inversion of the chromospheric MG I B lines
Authors:
Lites, B. W.; Skumanich, A.; Rees, D. E.; Murphy, G. A.
Affiliation:
AA(High Altitude Observatory, Boulder, CO), AB(High Altitude Observatory, Boulder, CO), AC(Sydney, University, Australia), AD(High Altitude Observatory, Boulder, CO; Sydney, University, Australia)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 330, July 1, 1988, p. 493-512. Research supported by the High Altitude Observatory. (ApJ Homepage)
Publication Date:
07/1988
Category:
Solar Physics
Origin:
STI
NASA/STI Keywords:
CHROMOSPHERE, LINE SPECTRA, MAGNETIC FIELD CONFIGURATIONS, SOLAR MAGNETIC FIELD, STOKES LAW OF RADIATION, LEAST SQUARES METHOD, MAGNESIUM, OPTICAL THICKNESS, THERMODYNAMIC EQUILIBRIUM
DOI:
10.1086/166487
Bibliographic Code:
1988ApJ...330..493L

Abstract

An analytic solution to the transfer equations for polarized radiation which allows for departures from LTE in the overall excitation of a chromospheric line is discussed, and a method of least-squares inversion is applied to profiles of Mg I b lines at 5172.7 and 5183.6 A observed in December 1978. An analytic form expressing the source function dependence on line-center optical depth leads to a generalization of an existing least-squares procedure which is found to be effective in recovering the magnetic field from simulated Stokes profiles under specified conditions. Reasonable magnetic field values are obtained if a macroturbulent profile smearing of 1-2 km/s is used and if the profiles are corrected for scattered light.

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Part  3     Part 1     Part  4     Part  2     Part  5     Part  6    


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